大气光通信中大孔径接收性能分析与孔径尺寸选择  

Performance Analysis of Large-Aperture Receiving and Selection of Aperture Size in Atmospheric Optical Communications

作　　者：陈纯毅[1] 杨华民[1] 姜会林[1] 佟首峰[1] 范静涛[1] 韩成[1] 

机构地区：[1]长春理工大学光电测控与光信息传输技术教育部重点实验室,吉林长春130022

出　　处：《中国激光》2009年第11期2957-2961,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(60677009);吉林省自然科学基金(20070527);吉林省教育厅"十一五"项目(2007294)资助课题

摘　　要：大孔径接收是克服大气光通信中大气湍流影响的有效途径之一。在有限孔径接收光强起伏理论基础上,建立了平均信噪比与无湍流影响时的探测器输出信噪比、孔径平均因子以及光强起伏方差之间关系的数学模型,并给出了系统误码率计算公式。通过数值计算得出了在给定误码率(BER)设计指标时,不同大气湍流参数条件下,接收孔径直径与无湍流影响时的探测器输出信噪比之间的关系曲线。Large-aperture receiving is one of the effective approaches to overcome the impact of turbulence on atmospheric optical communications. Based on the irradiance fluctuation theory for finite apertures,the relationship between the average signal-to-noise ratio and the quantities of the signal-to-noise ratio without turbulence,the aperture averaging factor and the irradiance fluctuation variance was mathematically modeled,and the formula of bit error rate （BER） was derived. The curves of relationship between the aperture diameter and the signal-to-noise ratio without turbulence at a given BER with various turbulence parameters were obtained numerically.

关 键 词：光通信 孔径平均 尺寸选择 大气湍流 信噪比 

分 类 号：TN929.1[电子电信—通信与信息系统] TN012[电子电信—信息与通信工程]